Duallist box in rails -- 2

I am looking for a working demo of a dual list box working within a Rails 5. The Rails form should use ERB and the dual list box we would like to use is demo: [login to view URL] Any records moved from the left column to the right column should saved to the db on submit and select fields are nested attributes. This should be a quick project for someone, and we could have many more if we find someone we like working with. Thanks!